Question

Simplify:

(1) $\frac{-5}{7}+\frac{10}{3}$

Answer 1

$$\begin{gathered} \frac{-5}{7}+\frac{10}{3} \\ =\frac{-5\times 3}{7\times 3}+\frac{10\times 7}{3\times 7} \\ =\frac{-15}{21}+\frac{70}{21} \\ =\frac{-15+70}{21} \\ =\frac{55}{21} \end{gathered}$$